The combustion chambers of the liquid propulsion rocket engines consist mainly of a copper base inner liner and a jacket of pulse-plated nickel. During the manufacturing process of this outer shell, occasional crack formation was observed. It is assumed that hydrogen trapped in the material is responsible for the premature failure. Within the European Union funded project MultiHy, the production steps and in-service-conditions were reviewed. For the development of numerical models for hydrogen-microstructure interactions in pulse-plated Nickel, a wide range of methods have been employed to characterise the crystallography of the material. Optical, scanning and transmission electron microscopy (SEM, TEM), scanning transmission electron microscopy (STEM), electron backscatter diffraction (EBSD) and X- ray diffraction were used to identify key aspects of the microstructure which are likely to affect hydrogen diffusion, thus providing a basis for the multiscale modelling of hydrogen embrittlement in crystalline materials.